Does this really work? I wish I had known when I were younger.
I recently made a shader to illustrate the complex square function using a camera:
https://www.shadertoy.com/view/scsGDH
The line goes like this: "can we make fractals using a video loop? Look at this!" and I would hold my phone at them, showing their face gruesomely distorted and duplicated... And then, after remarking that they can see everything twice, I'd ask them to go to the restroom with me, because I'd like to show them something in the mirror...
I have actually tried this in bars. It was a lot of fun. I didn't get into trouble, because I'm a nice guy, ymmv.